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Method and system of electric projectile through high-speed liquid for preparing superfine material

A high-speed fluid, ultra-fine material technology, applied in electrostatic spray devices, spray devices, devices for coating liquid on surfaces, etc., can solve the problems of complex and expensive, low output of ultra-fine fibers, and limited application fields

Inactive Publication Date: 2005-11-16
张爱华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size of ultrafine materials obtained by high-speed fluid technology is still too large, such as non-woven fabrics prepared by high-speed fluid, the diameter of the fiber is more than tens of microns, or the preparation method is complicated, such as through high-speed fluid collision gas phase reaction Preparation of ultrafine powders by deposition requires complex and expensive systems
EFI technology is widely used in mass spectrometry, engines, material drying, particle manufacturing, thin film manufacturing, pesticide spraying and other fields, but the prepared particles or size are too large, such as using high-speed spray technology or large-scale preparation of ultra-fine materials such as ultrasonic Spray technology, so the application field is limited to a certain range, and the ultrafine fiber prepared by electrospinning technology cannot be combined with industrial production due to its low output, so it is still difficult to obtain large-scale application

Method used

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  • Method and system of electric projectile through high-speed liquid for preparing superfine material
  • Method and system of electric projectile through high-speed liquid for preparing superfine material
  • Method and system of electric projectile through high-speed liquid for preparing superfine material

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preparation example Construction

[0043] The method for preparing the superfine powder material described in the present embodiment can also be summarized as the following 4 steps specifically:

[0044] 1. Preparation and storage of processed materials;

[0045] 2. Make the processed material charge and flow at a high speed;

[0046] 3. Material collection;

[0047] 4. Post-processing.

[0048] The purpose of the preparation and storage of the processed material is to fluidize the processed material. Usually, the methods of preparation and storage of processed materials include dissolution, melting, evaporation, plasmaization, and pulverization to make the processed materials into a fluid form. The corresponding unit is the preparation and storage part 1 of the processed material.

[0049] The charging process of the processed material can use corona charging, induction charging, contact charging, friction charging, charged fluid charging and other methods to charge the processed material. To charge the m...

Embodiment 1

[0056]Prepare a dimethylformamide solution of polylactic acid 10% (mass fraction) with a weight-average molecular weight of 200,000, add it to the liquid storage tank and apply a high pressure of 12MPa, and connect it to the nozzle of the high-speed electrohydrodynamic injection device with a conduit. The spinneret is a 0.8 mm circular nozzle hole, the positive pole of the high-voltage power supply is connected to the electrode inside the spinneret, and the negative pole is connected to the collecting plate. The distance between the nozzle and the collection plate is controlled at about 40cm, the voltage between the nozzle (positive electrode) and the counter electrode (negative electrode) is about 40kv, and the flow rate of the solution at the nozzle of the electrohydrodynamic injection device is about 1l / min, just pass through the collection plate Obtain polylactic acid microfibers.

Embodiment 2

[0058] Prepare a dimethylformamide solution of polylactic acid 10% (mass fraction) with a weight-average molecular weight of 200,000, add it to the liquid storage tank and apply a high pressure of 12MPa, and connect it to the nozzle of the high-speed electrohydrodynamic injection device with a conduit. The spinneret is a spinneret with 0.8mm special-shaped nozzle holes, the positive pole of the high-voltage power supply is connected to the electrode inside the spinneret, and the negative pole is connected to the collection plate. The distance between the nozzle and the collection plate is controlled at about 40cm, the voltage between the nozzle (positive electrode) and the counter electrode (negative electrode) is about 40kv, and the flow rate of the solution at the nozzle of the electrohydrodynamic injection device is about 1l / min, just pass through the collection plate Polylactic acid microfibers with high porosity were obtained.

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Abstract

A method for preparing superfine material by spraying the electrically charged high-speed fluid includes fluidizing the material to be processed, electrically charging it, pressure spraying via nozzle, and collecting the resultant superfine material. Its system is composed of high-speed jet unit, electric charger, and collector.

Description

technical field [0001] The invention relates to a method and system for preparing ultrafine materials, in particular to a method and system for preparing ultrafine materials by combining high-speed fluid technology and electrohydrodynamic jet technology. Background technique [0002] At present, ultrafine materials including ultrafine powder and ultrafine fiber have a wide range of application values ​​in the fields of medicine, catalysis, separation, protection, cosmetics, textiles, etc. due to their high specific surface area and small pores. received a lot of people's attention. At present, people have adopted high-speed fluid technology (including impinging flow technology), electrohydrodynamic jet technology including electrospray and electrospinning technology, sol-gel technology, vapor phase co-deposition technology, hydrothermal technology, ball milling technology, self-assembly technology, sacrificial template, etc. technology to prepare ultrafine materials, among ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/06
Inventor 张爱华张继中
Owner 张爱华